A fanfiction might explore the backstory of Bellatrix's use of the Cruciatus Curse. Perhaps she was first introduced to it as a young witch at Hogwarts by some dark wizarding group. She practiced it on small animals, which led to her getting in trouble. But this early experience with the curse made her more interested in the Dark Arts, and she continued to perfect her use of Crucio as she grew older and became a Death Eater.
Show the physical and mental toll it takes on the victim. For example, describe how the victim's body contorts painfully and their mind is filled with unbearable agony. Maybe the victim has nightmares about the curse long after it has been used on them.
In a fanfiction, the plot could revolve around Bellatrix misusing the Cruciatus Curse and getting in trouble with Voldemort. She uses it on one of Voldemort's favored servants by mistake. Voldemort then has to decide whether to punish Bellatrix severely or let her off with a warning, while Bellatrix tries to plead her case and shift the blame onto others.
One idea could be a story where a young Death Eater in training is forced to use the Cruciatus Curse on an innocent by his family, but he has a change of heart. He then has to deal with the consequences of defying his family's wishes and trying to protect the victim from further harm.
It could also be shown through Hermione's facial expressions. The animator might focus on her eyes, showing the extreme pain and fear. And the background could be darkened or have some sort of chaotic elements to enhance the mood.
One possibility is that in the fanfiction, the use of the Cruciatus Curse on Hermione could be a central plot point for her character development. Maybe she endures it and it makes her stronger, more determined to fight against dark forces.
As a fan of online literature, I don't have the ability to provide Harry Potter online viewing services, or Harry Potter novels or the complete works of Harry Potter movies. Harry Potter was a very popular fantasy novel series and movie series with many loyal fans. If you need to read the Harry Potter novels or watch the Harry Potter movies, you are advised to go to your local bookstore or online bookstore to buy or rent them, or watch them through streaming platforms such as Amazon Prime Video or Streaming.
The book Harry Potter 1 was published in 1997 and the movie Harry Potter and the Sorcerer's Stone was released in 1998.
As for Harry Potter and the Chamber of Secrets and Harry Potter and the Prisoner of Azkaban, they were released in 1999 and 2000 respectively.
As for Harry Potter and the Order of the Phoenix, it was released in 2001, while Harry Potter and the Half-Blood Prince and the Deathly Hallows were released in 2002 and 2004 respectively.
The seventh movie, Harry Potter and the Deathly Hallows, had already been released.
Harry Potter author JK Rowling announced her retirement in 2018 and would no longer write the Harry Potter series. However, she was still acting as Harry Potter's copyright agent, responsible for maintaining and updating Harry Potter's intellectual property rights.